/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package com.upao.controller;

import com.google.appengine.api.datastore.Entity;
import com.upao.util.DBCurso;
import com.upao.util.DBInstructor;
import com.upao.util.DBUser;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *
 * @author Rey
 */
public class InstructorServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            if (request.getParameter("action").equals("createInstructor")) {
                String nom_user = request.getParameter("nombre_user");
                //Long id_user = Long.parseLong(request.getParameter("id_user"));
                String nombres_instructor = request.getParameter("nombres_instructor");
                String ape_paterno = request.getParameter("ape_paterno");
                String ape_materno = request.getParameter("ape_materno");
                String grado = request.getParameter("grado");
                String especialidad = request.getParameter("especialidad");
                String correo = request.getParameter("correo");
                //
                Entity u = DBUser.getEntityUserByNombres(nom_user);
                Long id_user = u.getKey().getId();
                DBInstructor.save(id_user, nombres_instructor, ape_paterno, ape_materno, grado, especialidad, correo);
                //List<Entity> listInstructores = DBInstructor.getAllInstructores(id_user);
                List<Entity> listInstructores = DBInstructor.getInstructores();
                request.setAttribute("listInstructores", listInstructores);
                request.setAttribute("nombres", nom_user);
                String path = "/JSP/V_ListaInstructores.jsp";
                RequestDispatcher rd = getServletContext().getRequestDispatcher(path);
                rd.forward(request, response);

            } else if (request.getParameter("action").equals("getAllInstructores")) {
                String nombres = request.getParameter("nombres");
                Entity user = DBUser.getEntityUserByNombres(nombres);
                Long id_user = user.getKey().getId();

                //List<Entity> listInstructores = DBInstructor.getAllInstructores(id_user);
                //request.setAttribute("listInstructores", listInstructores);
                List<Entity> listInstructores = DBInstructor.getInstructores();
                request.setAttribute("listInstructores", listInstructores);
                request.setAttribute("nombres", nombres);
                String path = "/JSP/V_ListaInstructores.jsp";
                RequestDispatcher rd = getServletContext().getRequestDispatcher(path);
                rd.forward(request, response);

            } else if (request.getParameter("action").equals("cambioPagina")) {
                String nombres = request.getParameter("nombres");
                String path = request.getParameter("path");
                Entity user = DBUser.getEntityUserByNombres(nombres);
                request.setAttribute("user", user);

                //request.setAttribute("nombreCurso", nombre_curso);
                RequestDispatcher rd = getServletContext().getRequestDispatcher(path);
                rd.forward(request, response);
            } else if (request.getParameter("action").equals("deleteInstructor")) {
                //DBCurso.deleteCursoById(Long.parseLong(request.getParameter("id")));
                DBInstructor.deleteInstructorById(Long.parseLong(request.getParameter("id")));                    
                String nombres = request.getParameter("nombres").toString();
                Entity user = DBUser.getEntityUserByNombres(nombres);
                Long id_user = user.getKey().getId();
                List<Entity> listInstructores = DBInstructor.getInstructores();
                request.setAttribute("listInstructores", listInstructores);
                request.setAttribute("nombres", nombres);
                String path = "/JSP/V_ListaInstructores.jsp";
                RequestDispatcher rd = getServletContext().getRequestDispatcher(path);
                rd.forward(request, response);
            }
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
